MS Power Point
To change font size of a selected slide title, you:

Click Title, New Font, OK
Click the toolbars Font dropdown arrow and choose the font you prefer
Click the toolbar’s Increase Font Size button
Click Format, Title and choose a font from the font tab

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MS Power Point
How to change the order of Slides in Presentation?

On Slide Thumbnail view, click on the slide and drag to required position
On Slide Sorter View, click on the slide and drag to required position
On Slide Sorter View, click on the Soft Slides
Slides order cannot be changed once it created

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